4200124021 has 4 divisors (see below), whose sum is σ = 4421183200. Its totient is φ = 3979064844.

The previous prime is 4200124013. The next prime is 4200124031. The reversal of 4200124021 is 1204210024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4200124021 - 2³ = 4200124013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4200123986 and 4200124004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4200124031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110529561 + ... + 110529598.

It is an arithmetic number, because the mean of its divisors is an integer number (1105295800).

Almost surely, 2^4200124021 is an apocalyptic number.

It is an amenable number.

4200124021 is a deficient number, since it is larger than the sum of its proper divisors (221059179).

4200124021 is a wasteful number, since it uses less digits than its factorization.

4200124021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221059178.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 4200124021 is about 64808.3638198034. The cubic root of 4200124021 is about 1613.4445267440. Note that the first 3 decimals are identical.

Adding to 4200124021 its reverse (1204210024), we get a palindrome (5404334045).

The spelling of 4200124021 in words is "four billion, two hundred million, one hundred twenty-four thousand, twenty-one".